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Document and Entity Information
Mar. 01, 2024
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001288847
Document Type 8-K
Document Period End Date Mar. 01, 2024
Entity Registrant Name FIVE9, INC.
Entity Incorporation State Country Code DE
Entity File Number 001-36383
Entity Tax Identification Number 94-3394123
Entity Address, Address Line One 3001 Bishop Drive
Entity Address, Address Line Two Suite 350
Entity Address, City or Town San Ramon
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94583
City Area Code (925)
Local Phone Number 201-2000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, par value $0.001 per share
Trading Symbol FIVN
Security Exchange Name NASDAQ
Entity Emerging Growth Company false